Extending 50% to 50% On WindowState Maximized Mode On The Winforms Project

Question

When the WindowState is "Normal", I can locate the controls on the left side and the right side by 50% to 50%. I want to locate the controls on the left side and the right side by 50% to 50% on the "Maximized" mode. For this, I set the anchors of the left side controls Top, Left, Right and set the anchors of the right side controls Top and Right. On the result, left side controls are extending as seen in the GIF picture but the right side controls are not extending %50. What can I do for this without using the TableLayoutPanel?